package com.itheima.security;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    /**
     * 通过dubbo远程调用UserService
     */
    @Reference
    private UserService userService;

    /**
     * 根据用户名查询数据
     * @param username
     * @return userdetails
     * @throws UsernameNotFoundException
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.findByUsername(username);
        if (user==null){
            return null;
        }
        ArrayList<GrantedAuthority> list = new ArrayList<>();
        //获取角色的set集合
        Set<Role> roles = user.getRoles();
        //遍历set集合
        for (Role role : roles) {
            //授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        org.springframework.security.core.userdetails.User userDetails = new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
        return userDetails;

    }
}
